Note 1 - Summary of Significant Accounting Policies - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accumulated amortization	$ (15,625)	$ (11,835)
Total intangible assets	74,371	74,371
Trade Names [Member]
Trade names	$ 31,430	31,430
Customer Relationships [Member]
Weighted average life (Year)	12 years 8 months 12 days
Gross carrying amount	$ 41,530	41,530
Accumulated amortization	$ (14,773)	(11,246)
Noncompete Agreements [Member]
Weighted average life (Year)	5 years 4 months 24 days
Gross carrying amount	$ 1,411	1,411
Accumulated amortization	$ (852)	$ (589)